fifth does not reach by about an inch. The sixth & seventh costal ribs are close together distally but do not reach sternum. The 8th is very short and is only a point of cartilage. There are ten pairs of ribs, the last two being very short. The tube of the blowhole (which is lined with dark epidermis) runs along first under the bladder, and opens on the left side of the top of the head near the extremity. Directly below the blowhole tube is the case containing the more or less liquid spermaceti; the walls of this case are tough and fibrous. Below (directly) the spermaceti case is a second tube lined with gray epidermis which opens forward around the anterior end of the oil case into the blowhole. Posteriorly this second tube opens into a large, shallow upright chamber lined with epidermis, immediately behind which lies immediately behind the posterior end of the barrel-like spermaceti case. A tube the size of my finger leads from this shallow chamber into the posterior anal opening. The tube which leads to the upper blowhole tube which leads into the posterior nares